spx432am5-tr Exar Corporation, spx432am5-tr Datasheet - Page 7

• Manufacturer Part Number: spx432am5-tr
• Description: 1.24v Precision Adjustable Shunt Regulator
• Manufacturer: Exar Corporation

Shunt Regulator, V
Date: 12/11/04
Reference Amplifier for Isolated Feedback in Off-Line
DC-DC Converters.
High Current Shunt Regulator, V
Feedback
Isolated
V
IN
V
IN
Opto Isolator
C2
R2
0.1%
R1
0.1%
+
V
R3
OUT
OUT
SPX432
0.1%
0.1%
= (1+R1/R2)V
V
SPX432
R3
REF
R1
R2
V
OUT
C1
RTN
OUT
R3
REF
= (1+R1/R2)V
.
R1
0.1%
R2
0.1%
R3 sets feedback gain,
C1 provides feedback
compensation
SPX432 1.24V Precision Adjustable Shunt Regulator
SPX432
Q1
V
OUT
V
OUT
REF
TYPICAL PERFORMANCE CHARACTERISTICS
.
7
Constant Current Sink I
Single Supply Comparator with Temperature
Compensated Threshold, V
Precision High Current Series Regulator,
V
OUT
SPX432
V
IN
= (1+R1/R2)V
V
SPX432
IN
R5
R1
V
SPX432
R4
REF
IN
C1
R2
.
SINK
R2
0.1%
© Copyright 2004 Sipex Corporation
IN
0.1%
V
R1
= V
CC
threshold = 1.24V.
REF
R2
R3
/R1.
R1
0.1%
I
SINK
Q1
V
OUT
V
OUT